LTC2263CUJ-14 - Dual 14-Bit 25Msps Low-Power ADC | Analog Devices
MPN: LTC2263CUJ-14 ✓ Hoạt độngLTC2263CUJ-14 Tóm tắt
A dual ADC (dual-channel analog-to-digital converter) is a component that integrates two independent sampling channels on a single die, allowing simultaneous capture of two analog signals at the same clock instant. This dual architecture is widely used in communications receivers where I/Q baseband signals must be sampled synchronously, in diversity antenna systems, and in any multi-channel instrumentation application. The LTC2263CUJ-14 belongs to the broader pipelined ADC family within the data acquisition IC category, which sits hierarchically under converter ICs and signal chain semiconductors.
The device includes selectable 1V P-P to 2V P-P input ranges, an 800 MHz full-power bandwidth sample-and-hold, and serial LVDS outputs configurable for 1-bit or 2-bit per channel modes. DC accuracy is excellent, with ±1 LSB INL (typical), ±0.3 LSB DNL (typical), and no missing codes over temperature. The low 1.2 LSB RMS transition noise ensures clean digital output even at full-scale inputs.
Pin-compatible 14-bit and 12-bit versions allow system designers to migrate between resolutions without PCB rework, while the integrated SPI configuration port, shutdown, and nap modes simplify power management. According to the manufacturer datasheet, the recommended PCB layout requires a clean unbroken ground plane with the first internal layer dedicated to ground beneath the ADC.
Typical applications include software-defined radio (SDR), cellular base-station receivers, portable instrumentation, and low-power medical imaging. The wide 800 MHz input bandwidth makes the part particularly attractive for undersampling IF signals in communications receivers.
When laying out the PCB, ensure that analog input traces are routed as differential pairs over a continuous ground plane to preserve the 73.7 dB SNR. Place the 1.8V supply decoupling network within 5 mm of the AVDD pins to suppress switching-noise coupling.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives from the same ADC family, and practical PCB/layout guidance that goes beyond what is found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho LTC2263CUJ-14 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LTC2263CUJ-14 (cùng hình factor và footprint) — khác nhau ở Package, Resolution, Configuration Interface, Power Dissipation, Sample Rate.
LTC2263CUJ-14#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2263CUJ-14#TRPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2263CUJ-12
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2264CUJ-14
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2260CUJ-14
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2263CUJ-14 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 14 bit |
| Number of Channels | 2 (dual, simultaneous sampling) |
| Sample Rate | 25 Msps |
| Architecture | Pipelined |
| Điện áp cung cấp | 1.8 V (single) |
| Total Power Consumption | 94 mW (47 mW per channel) |
| SNR | 73.7 dB |
| SFDR | 90 dB |
| INL (typical) | ±1 LSB |
| DNL (typical) | ±0.3 LSB |
| Transition Noise | 1.2 LSB RMS |
| Input Range | 1 V P-P to 2 V P-P (selectable) |
| Full Power Input Bandwidth | 800 MHz |
| Digital Output | Serial LVDS (1 or 2 bits per channel) |
| Configuration Interface | Serial SPI port |
| Hộp | 40-pin QFN (6 mm x 6 mm) |
| Nhiệt độ hoạt động | 0C to +70C (commercial grade) |
| Pin Compatibility | Yes - with 12-bit versions in same family |
Cấu hình chân LTC2263CUJ-14
| Chân 1 | GND — Ground (digital) |
| Chân 2 | SENSE — Reference mode select |
| Chân 3 | VDD — 1.8V analog supply |
| Chân 4 | OGND — Output driver ground |
| Chân 5 | OVDD — Output driver supply |
| Chân 6 | CLKOUT- — LVDS clock output (negative) |
| Chân 7 | CLKOUT+ — LVDS clock output (positive) |
| Chân 8 | OF- — LVDS frame output (negative) |
| Chân 9 | OF+ — LVDS frame output (positive) |
| Chân 10 | DB0- — LVDS data output bit 0 (negative) |
| Chân 11 | DB0+ — LVDS data output bit 0 (positive) |
| Chân 12 | DB1- — LVDS data output bit 1 (negative) |
| Chân 13 | DB1+ — LVDS data output bit 1 (positive) |
| Chân 14 | DB2- — LVDS data output bit 2 (negative) |
| Chân 15 | DB2+ — LVDS data output bit 2 (positive) |
| Chân 16 | DB3- — LVDS data output bit 3 (negative) |
| Chân 17 | DB3+ — LVDS data output bit 3 (positive) |
| Chân 18 | GND — Ground (digital) |
| Chân 19 | DB4- — LVDS data output bit 4 (negative) |
| Chân 20 | DB4+ — LVDS data output bit 4 (positive) |
| Chân 21 | DB5- — LVDS data output bit 5 (negative) |
| Chân 22 | DB5+ — LVDS data output bit 5 (positive) |
| Chân 23 | DB6- — LVDS data output bit 6 (negative) |
| Chân 24 | DB6+ — LVDS data output bit 6 (positive) |
| Chân 25 | SDI — SPI serial data input |
| Chân 26 | SCK — SPI serial clock input |
| Chân 27 | CS — SPI chip select (active low) |
| Chân 28 | SDO — SPI serial data output |
| Chân 29 | GND — Ground (analog) |
| Chân 30 | VA+ — Channel A positive analog input |
| Chân 31 | VA- — Channel A negative analog input |
| Chân 32 | GND — Ground (analog) |
| Chân 33 | VB+ — Channel B positive analog input |
| Chân 34 | VB- — Channel B negative analog input |
| Chân 35 | GND — Ground (analog) |
| Chân 36 | REFT — Reference decoupling top |
| Chân 37 | REFB — Reference decoupling bottom |
| Chân 38 | MODE — Output mode select (1-lane / 2-lane) |
| Chân 39 | CLK- — LVDS clock input (negative) |
| Chân 40 | CLK+ — LVDS clock input (positive) |
Ứng dụng tiêu biểu
LTC2263CUJ-14 phù hợp cho 6 Áp dụngs: Software-Defined Radio (SDR) Receiver, Cellular Base-Station Receiver, Portable Instrumentation and Data Acquisition, Medical Ultrasound Imaging Front-End, Industrial Vibration and Acoustic Monitoring, Multi-Channel Spectrum Analyzer / Signal Intelligence.
Software-Defined Radio (SDR) Receiver
The LTC2263CUJ-14 fits SDR receiver designs because its 800 MHz full-power input bandwidth enables direct undersampling of IF signals in HF/VHF bands, eliminating downconversion mixer stages. The dual simultaneous-sampling channels capture I and Q baseband signals at the same clock instant, preserving phase coherence required for demodulation. With 73.7 dB SNR and 90 dB SFDR, the part cleanly resolves weak signals in the presence of strong adjacent interferers - critical for crowded amateur radio and spectrum-monitoring bands. The serial LVDS outputs minimize FPGA pin count, and the 94 mW total power consumption is acceptable for portable SDR dongles and field-deployable receivers.
Được đề xuất
Cellular Base-Station Receiver
In cellular base-station receiver designs the LTC2263CUJ-14 digitizes the I and Q analog outputs of the dual downconversion chain with 73.7 dB SNR that exceeds the dynamic-range requirements of 3G/4G receiver sensitivity specifications. The 25 Msps per-channel rate accommodates multiple adjacent UMTS/LTE carrier bandwidths after digital filtering, while the 90 dB SFDR prevents false-channel decoding from strong blocker signals. Single 1.8 V supply simplifies power tree design, and the 40-QFN 6x6mm footprint allows compact placement near the RF section. The SPI configuration port enables firmware-driven input-range and lane-mode selection during factory calibration.
Được đề xuất
Portable Instrumentation and Data Acquisition
The LTC2263CUJ-14 is well-suited to portable data-acquisition systems where two sensor channels must be captured synchronously, such as two-axis vibration analysis, dual-channel ultrasound front-ends, or portable oscilloscope channels. Its 94 mW total power consumption extends battery life in handheld instruments, while 73.7 dB SNR provides more than 11.5 effective bits of dynamic range. The shutdown and nap modes - controllable via the SPI port - allow further power reduction when the ADC is not actively sampling, which is essential for duty-cycled measurement loops. The 40-QFN package is compatible with handheld-instrument board densities.
Được đề xuất
Medical Ultrasound Imaging Front-End
Portable and handheld ultrasound probes benefit from the LTC2263CUJ-14's dual simultaneous-sampling architecture, which captures echo pairs from phased-array transducer elements with deterministic phase alignment. The 73.7 dB SNR contributes directly to penetration depth and contrast sensitivity, while the 1.2 LSB RMS transition noise ensures that subtle tissue echoes are not buried in quantisation noise. The 25 Msps rate supports mid-band imaging up to 12 MHz IF when paired with appropriate anti-alias filtering. Low power (94 mW) keeps thermal dissipation acceptable in patient-contact probes.
Được đề xuất
Industrial Vibration and Acoustic Monitoring
The LTC2263CUJ-14 supports dual-axis MEMS accelerometer and microphone array digitisation in predictive-maintenance systems, where simultaneous capture of two orthogonal vibration axes is essential for fault diagnosis. With 800 MHz input bandwidth and 73.7 dB SNR, the part cleanly digitises vibration signals from low-frequency bearing defects through mid-frequency gear-mesh harmonics. The wide 1-2 V P-P programmable input range adapts to different MEMS output levels without external attenuators. Nap and shutdown modes reduce power during idle periods between rest sensor polls, extending field-deployment battery life.
Được đề xuất
Multi-Channel Spectrum Analyzer / Signal Intelligence
Spectrum analyzers and signal-intelligence receivers can use multiple LTC2263CUJ-14 devices in parallel to build wideband capture systems, since each dual ADC provides two phase-coherent channels with 73.7 dB SNR and 90 dB SFDR. The serial LVDS outputs route cleanly to FPGAs over long board traces with minimal EMI susceptibility. The 800 MHz full-power bandwidth allows each pair of channels to digitise a substantial instantaneous bandwidth after FFT processing, while the 1.8 V single supply simplifies thermal and EMI design in dense multi-board racks. Pin compatibility with the LTC2264CUJ-14 and LTC2265CUJ-14 offers future-proof upgrade paths.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2263CUJ-14 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LTC2263CUJ-14#PBF | LTC2263CUJ-14#TRPBF | LTC2263CUJ-12 | LTC2264CUJ-14 | LTC2260CUJ-14 |
|---|---|---|---|---|---|---|
| Package | 40-QFN (6x6) | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 14 bit | 14 bit | 14 bit | 12 bit | 14 bit | 14 bit |
| Sample Rate | 25 Msps | 25 Msps | 25 Msps | 25 Msps | 40 Msps | 105 Msps |
| Number of Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| SNR | 73.7 dB | 73.7 dB | 73.7 dB | ~71 dB | 73.7 dB | 73.7 dB |
| Total Power Consumption | 94 mW | 94 mW | 94 mW | 94 mW | 113 mW | 140 mW (approx) |
| Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
Bảo phân biệt quan trọng
- Lowest power consumption at 25 Msps in the LTC2263/4/5-14 family (vsLTC2264CUJ-14)
- 14-bit resolution upgrade path from 12-bit without PCB rework (vsLTC2263CUJ-12)
- Pin-compatible upgrade path to higher sample rates in same family (vsLTC2260CUJ-14)
Ghi chú thiết kế
The LTC2263CUJ-14 datasheet mandates a multilayer PCB with a clean, unbroken ground plane and the first internal layer dedicated to ground directly beneath the ADC. Route the differential analog inputs (VA+/VA-, VB+/VB-) as tightly-coupled 100-ohm differential pairs from the input driver to the ADC pins, keeping trace lengths matched within 0.5 mm to preserve 73.7 dB SNR. Place the 1.8 V AVDD decoupling network (10 uF bulk + 0.1 uF + 1 nF ceramic) within 5 mm of the AVDD pins, and isolate analog and digital ground returns until they join at a single point beneath the exposed paddle.
Each LVDS output pair must be terminated with a 100-ohm differential termination resistor placed close to the receiving FPGA/ASIC pins. Keep the LVDS trace lengths matched within 2 mm to avoid skew-induced sampling errors, and route LVDS away from any analog input traces to prevent digital switching noise from coupling into the 800 MHz input signal path. If using the 1-lane mode, the unused LVDS pairs should be left open or terminated at the receiver; do not float them adjacent to sensitive analog traces.
Do not assume the LTC2263CUJ-12 is interchangeable in software - although the pinout is identical, the output word width and expected data format differ because of the 12-bit vs 14-bit resolution. Ensure your downstream FPGA/ASIC handles the configured 1-lane or 2-lane output mode correctly, as data bits are reassigned between modes. The MODE pin and SPI configuration register both influence this; verify both before assuming output bit positions. Finally, do not exceed the 1.8 V absolute-maximum rating on any supply pin - the part is not 3.3 V tolerant.
Thông tin tuân thủ
RoHS compliant per manufacturer datasheet (22654314fb). Commercial grade (0C to +70C); not AEC-Q100 qualified for automotive. The #PBF suffix denotes lead-free / RoHS compliant finish.
